I always assumed that using high speed was for vacuuming and other maintenance periods only. Are you saying that you need to run on high a certain amount of time per day, plus on low the remainder of the day? Wow - I didn't know that warmer water caused that much of an issue for the filtration system!

For what it's worth, it seems like the least expensive way is to avoid running on high automatically if possible, and that probably means employing alternative strategies to ensure your filter is operating more effectively for you. Perhaps that means a different pump or filter too? Maybe better circulation via an additional return, or adding a drain? So much for inexpensive, eh?

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